Multiple output crystal oscillator

Abstract

The present invention relates to a multiple output crystal oscillator having a plurality of output terminals for implementing multiple output and Integrated Circuit (IC) chips. More particularly, the crystal oscillator comprises a crystal resonator, a first IC chip having an oscillating circuit block and a frequency-adjusting circuit block, a second IC chip having an output-adjusting block, and a substrate structure for mounting said first and second IC chips, wherein said output terminals include a basic output terminal for outputting the oscillating signal from said first IC chip and at least one additional output terminal for outputting at least one wave form-adjusted oscillation signal from said second IC chip. In the present invention, said basic output terminal is placed on one of four underside corners of said substrate, and said additional output terminal is placed on the portion of the underside except the corners.

What is claimed is:  
     
       1. A multiple output crystal oscillator comprising: 
       a crystal resonator;  
       a first IC chip having an oscillating circuit block for oscillating a resonance signal from said crystal resonator and a frequency-adjusting circuit block;  
       a second IC chip having an output-adjusting block for adjusting the oscillation signal from said oscillating circuit block of the first IC chip into at least one different waveform and then outputting those adjusted signals; and  
       a substrate structure for mounting said first and second IC chips and having output terminals on the underside,  
       wherein said terminals of the substrate include a basic output terminal for outputting the oscillation signal from said first IC chip and at least one additional output terminal for outputting at least one waveform-adjusted oscillation signal from said second IC chip.  
     
     
       2. The multiple output crystal oscillator according to  claim 1 , wherein one of said basic and additional output terminals is placed on one of four underside corners of said substrate, and the other one of said basic and additional output terminals is placed on the portion of the underside except the corners. 
     
     
       3. The multiple output crystal oscillator according to  claim 2 , wherein said basic output terminal is placed on one of four underside corners of said substrate, and said additional output terminal is placed on the portion of the underside except the corners. 
     
     
       4. The multiple output crystal oscillator according to  claim 1 , wherein said additional output terminal is provided on a lateral portion of said substrate, extending to the bottom of the lower substrate. 
     
     
       5. The multiple output crystal oscillator according to  claim 1 , wherein said output-adjusting block of the second IC chip includes: 
       a diode for amplifying the oscillation, signal from said first IC chip;  
       a resistance provided between an input terminal of said diode and a ground terminal; and  
       a capacitor provided between an output terminal of said diode and the ground terminal.  
     
     
       6. The multiple output crystal oscillator according to  claim 1 , wherein said first IC chip further has a temperature-compensating circuit block. 
     
     
       7. A multiple output crystal oscillator comprising: 
       a crystal resonator;  
       an IC chip having an oscillating circuit block for oscillating a resonance signal from said crystal resonator, a frequency-adjusting circuit block and an output-adjusting block for adjusting the oscillation signal from said oscillating circuit block into at least one different waveform and then outputting those adjusted signals; and  
       a substrate structure for mounting said IC chips and having output terminals on the underside,  
       wherein said output terminals of the substrate include a basic output terminal for outputting the oscillation signal from said oscillating circuit block and at least one additional output terminal for outputting at least one waveform-adjusted oscillation signal from said output-adjusting block.  
     
     
       8. The multiple output crystal oscillator according to  claim 7 , wherein one of said basic and additional output terminals is placed on one of four underside corners of said substrate, and the other one of said basic and additional output terminals is placed on the portion of the underside except the corners. 
     
     
       9. The multiple output crystal oscillator according to  claim 8 , wherein said basic output terminal is placed on one of four underside corners of said substrate, and said additional output terminal is placed on the portion of the underside except the corners. 
     
     
       10. The multiple output crystal oscillator according to  claim 7  wherein said additional output terminal is provided on a lateral portion of said substrate, extending to the bottom of the lower substrate. 
     
     
       11. The multiple output crystal oscillator according to  claim 7 , wherein said output-adjusting block of the IC chip includes: 
       a diode for amplifying the oscillation signal from said first IC chip;  
       a resistance provided between an input terminal of said diode and a ground terminal; and  
       a capacitor provided between an output terminal of said diode and the ground terminal.  
     
     
       12. The multiple output crystal oscillator according to  claim 7 , wherein said IC chip further has a temperature-compensating circuit block.